a Nabipour Chakoli - Nuclear Safety and Radiological Protection Research Department, NSTRI, Tehran, Iran,
m Amirian Chayjan - Teachers University, Ferdosi Center, Baghestan, Karaj, Iran,
f Mianji - Nuclear Safety and Radiological Protection Research Department, NSTRI, Tehran, Iran,
hadi Fathollahi - School of Agriculture, NSTRI, Rajaeeshahr, Karaj, Iran,

Gamma irradiation is often used to sterilize biomedical devices for medical applications. However, high energy radiation can damage medical devices made from polymers, even at the minimum sterilization dose of 25 kGy. Radiation sterilization is especially damaging to biodegradable polymers, such as Poly(L-lactide) (PLLA) which even decompose when irradiated. In this research, neat PLLA was synthesized and irradiated by gamma irradiation processing. The physical and chemical properties of neat PLLA and irradiated PLLA were checked out using, FT-IR, XRD and SEM. The research results show that 25 KGy gamma irradiation don’t change the physical and mechanical properties of PLLAs. Also, it is found that with increasing the dosage of gamma to 100 KGy, the properties of PLLAs, due to decreasing the mechanical properties, are useless for medical performance

Poly (L-lactide), Sterilization, Gamma Irradiation, Crosslinking, Microstructure